TIANYU CF8M Pneumatic Flanged Floating Ball Valve: 2in-16in (DN50-DN400) PN10-PN16 API/ANSI Class Corrosion-Resistant Flow Control Solution for Industrial Media

I. Product Overview

II. Key Attribute Specifications

A. Dimensional & Pressure-Temperature Parameters

• Port Size: 2in to 16in (DN50 to DN400), covering medium to large industrial pipeline requirements. This range caters to applications from small-scale process lines (e.g., 2in DN50 for chemical dosing) to high-flow systems (e.g., 16in DN400 for water distribution mains). The full-port design ensures the valve’s internal diameter matches the pipeline, minimizing pressure drop and maximizing flow efficiency.
• Pressure Rating: PN10 (1.0MPa) to PN16 (1.6MPa), equivalent to CLASS 150, aligning with industrial low-to-medium pressure standards. Hydrostatic testing follows API 598: 1.5× rated pressure for the valve shell and 1.1× rated pressure for the seat, ensuring structural integrity and leak-tight performance.
• Temperature Range: 32°F to 150°F (0℃ to 65℃) as standard, extendable to -20℃ to 200℃ with specialized seal materials (e.g., PEEK). This range supports ambient and moderately heated industrial media, from chilled water to process fluids in chemical manufacturing.

B. Material Composition

• Valve Body & Bonnet: CF8M stainless steel (ASTM A351), containing 16–18% chromium, 10–12% nickel, and 2–3% molybdenum. This alloy offers superior corrosion resistance to chlorides, acids, and alkalis compared to 304 stainless steel, making it ideal for coastal, chemical, and marine environments.
• Ball: Solid CF8M stainless steel with a precision-ground surface finish (Ra ≤0.2μm), ensuring uniform contact with the seat for reliable sealing. The floating design allows the ball to shift under media pressure, enhancing seal tightness.
• Valve Stem: 17-4PH stainless steel or 316 stainless steel, featuring an anti-blowout design to prevent stem ejection under pressure. The material resists corrosion and mechanical wear, ensuring long-term operational safety.
• Seal Materials: FPM (fluoropolymer), FKM (fluorocarbon rubber), or PTFE (polytetrafluoroethylene) as standard. FPM/FKM suits oil, fuel, and chemical media, while PTFE offers chemical inertness for aggressive acids, alkalis, and solvents.
• Gaskets & Packing: Spiral-wound gaskets (stainless steel with graphite filler) for body-bonnet sealing, and PTFE-impregnated packing for stem sealing—ensuring leak-tight integrity and reduced friction.

C. Connection & Operational Features

• Connection Type: Flanged ends (ANSI B16.5, Raised Face/RF) as standard, with optional NPT threaded connections for small port sizes (2in–4in). The RF flange design ensures secure gasket seating, compatible with standard pipeline flanges for easy installation and retrofitting.
• Operation Mode: Pneumatic actuation (double-acting or spring-return) with manual override. Double-acting actuators use compressed air for both opening and closing, offering fast cycle times (10–30 seconds for DN400). Spring-return actuators provide fail-safe operation (auto-close or auto-open) during air supply loss—critical for safety-critical applications. Manual override enables emergency operation during power or air outages.
• Control & Feedback: Optional position feedback (limit switches or 4–20mA analog signals) for integration with SCADA/DCS systems, enabling remote monitoring and automated process control.
• Safety Features: Anti-static device (optional) to discharge static electricity in flammable media applications; lockable actuator (optional) to prevent unauthorized operation.

D. Certifications & Compliance

• Industry Standards: API 608 (floating ball valves), ASME B16.34 (valves—flanged, threaded, and welding end), ASME B16.5 (pipe flanges), API 598 (valve testing and inspection), ISO 9001.
• Material Certifications: ASTM A351 (CF8M), ASTM A564 (17-4PH), FDA (optional for food-grade applications).
• Regional Approvals: CE, ATEX (optional for hazardous environments), WRAS (optional for potable water).

III. Feature Description

A. CF8M Stainless Steel Construction: Corrosion Resistance in Harsh Environments

B. Floating Ball Design: Self-Enhancing Sealing Performance

C. Pneumatic Actuation: Automated Efficiency & Safety

• Speed & Consistency: Double-acting actuators open/close the valve in 10–30 seconds (depending on size), ensuring rapid response to process changes. In a water treatment plant’s filtration system, this allows for quick switching between filter beds, improving operational efficiency.
• Fail-Safe Protection: Spring-return actuators provide fail-safe operation, automatically closing (or opening) the valve during air supply loss. In an oil refinery’s fuel line, this prevents media spillage and fire risks, meeting safety regulations (e.g., OSHA, EU REACH).
• Remote Control: Integration with SCADA/DCS systems via position feedback signals enables centralized monitoring and control. For large industrial facilities with multiple valves, this eliminates the need for on-site manual operation, reducing labor costs by 60% and improving safety.

D. Flanged Connection: Installation Flexibility & Reliability

• Secure Sealing: The RF flange design, paired with spiral-wound gaskets, ensures leak-tight sealing even under vibration or pressure fluctuations. In a chemical plant’s reactor feed line, this prevents fugitive emissions of hazardous chemicals.
• Easy Maintenance: Flanged valves can be disassembled without cutting pipelines, simplifying inspection, seat replacement, or actuator maintenance. This reduces downtime by 50% compared to welded valves, critical for continuous-process industries.
• Compatibility: ANSI B16.5 compliance ensures compatibility with global pipeline systems, making the valve suitable for multi-vendor projects and international installations.

E. Versatile Seal Materials: Media Compatibility

• FPM/FKM Seals: Resist oil, fuel, hydraulic fluids, and most organic solvents, making them ideal for oil and gas, automotive, and manufacturing applications.
• PTFE Seals: Offer chemical inertness to nearly all industrial chemicals (acids, alkalis, oxidizers) and food-grade media, suitable for chemical processing, pharmaceutical, and food & beverage industries.

In a chemical plant’s acid waste treatment system, a PTFE-sealed CF8M valve resisted degradation from hydrochloric acid, while an FPM-sealed valve in an oil refinery’s fuel line prevented leakage of diesel fuel.

IV. Manufacturing Processes

A. Material Inspection & Preparation

• CF8M Verification: Raw material billets undergo spectral analysis to confirm chemical composition (Cr: 16–18%, Ni: 10–12%, Mo: 2–3%) and ultrasonic testing to detect internal defects. Mechanical testing (tensile strength ≥515MPa, yield strength ≥205MPa) ensures compliance with ASTM A351.
• Seal Material Testing: FPM/FKM/PTFE seals are tested for compression set, tensile strength, and chemical resistance at operational temperatures (0℃–65℃) to ensure long-term performance.

B. Valve Body & Ball Fabrication

• Casting: The valve body and bonnet are produced via investment casting for CF8M stainless steel, ensuring dimensional accuracy and a smooth internal surface. Castings are visually inspected for surface defects (porosity, cracks) and heat-treated to relieve internal stresses.
• Machining: CNC turning and milling centers precision-machine the body, bonnet, and flange faces. Flange dimensions are machined to ASME B16.5 standards, with flatness tolerance ≤0.05mm/m and surface finish Ra ≤3.2μm for proper gasket seating. The ball is ground to a mirror-like finish (Ra ≤0.2μm) to ensure uniform seal contact.

C. Stem & Actuator Integration

• Stem Machining: Valve stems are CNC-machined from 17-4PH or 316 stainless steel, with a polished surface (Ra ≤0.4μm) to reduce friction and enhance corrosion resistance. The anti-blowout feature is integrated during machining, preventing stem ejection under pressure.
• Actuator Assembly: Pneumatic actuators (aluminum alloy housing) are assembled with precision gears, pistons, and springs. Double-acting actuators are tested for air tightness (0.6MPa pressure, 30-minute hold, no leakage). Spring-return actuators are calibrated to ensure fail-safe operation with the correct return force.
• Valve-Actuator Mounting: The actuator is mounted to the valve via an ISO 5211 adapter flange, with laser alignment to ensure coaxiality (runout ≤0.05mm) and smooth operation.

D. Seal Installation & Quality Testing

• Seal Installation: FPM/FKM/PTFE seats are precision-cut and press-fitted into the valve body, with spring loading to compensate for thermal expansion and wear. The ball is inserted, and the bonnet is secured with high-strength bolts to compress the gasket.
• Hydrostatic Testing: The valve undergoes shell testing at 1.5× rated pressure (e.g., 2.4MPa for PN16) and seat testing at 1.1× rated pressure (e.g., 1.76MPa for PN16), with a 30-minute hold time. No leakage, sweating, or deformation is allowed.
• Operational Testing: The valve is cycled 100 times with pneumatic actuation to verify smooth operation, torque consistency, and seal integrity. Cycle time and actuator response are recorded to ensure compliance with specifications.
• Non-Destructive Testing (NDT): Critical welds (if applicable) undergo liquid penetrant testing (PT) to detect surface cracks; cast components are inspected via magnetic particle testing (MPI) for surface defects.

E. Final Inspection & Documentation

• Visual Inspection: The valve is inspected for surface finish, proper marking (port size, pressure rating, material, serial number), and compliance with ASME B16.34.
• Documentation: Each valve is accompanied by a Material Test Report (MTR) for CF8M steel, hydrostatic test report, and compliance certificates (API 608, ISO 9001).

V. Product Advantages

A. Superior Corrosion Resistance

B. Bubble-Tight Sealing

C. Automated Efficiency & Safety

D. Easy Installation & Maintenance

E. Versatile Application Compatibility

F. Cost-Effective Long-Term Performance

VI. Product Applications

A. Chemical Processing

• Chemical Transfer Lines: 2in–12in (DN50–DN300) valves with PTFE seals handle acids (sulfuric acid, hydrochloric acid), alkalis (sodium hydroxide), and solvents (acetone, ethanol). CF8M resists chemical corrosion, while the floating ball design ensures leak-tight performance.
• Reactor Feed Systems: 4in–8in (DN100–DN200) valves regulate flow of reactants and catalysts in batch or continuous reactors. Pneumatic actuation enables precise dosing, improving process efficiency and product quality.

B. Oil & Gas Industry

• Refined Products Pipelines: 6in–16in (DN150–DN400) valves with FKM seals control flow of gasoline, diesel, and lubricants. CF8M resists hydrocarbon corrosion, and the flanged connection ensures secure sealing in high-flow lines.
• Gas Distribution: 2in–6in (DN50–DN150) valves manage natural gas or propane flow in industrial and commercial systems. The anti-static device (optional) mitigates explosion risks in flammable media.

C. Water & Wastewater Treatment

• Potable Water Distribution: 8in–16in (DN200–DN400) valves with FPM seals regulate flow in municipal water mains. CF8M ensures water quality by resisting corrosion, and the full-port design minimizes pressure drop.
• Wastewater Treatment: 4in–12in (DN100–DN300) valves handle corrosive effluents and sludge. PTFE seals resist chemical attack from cleaning agents, while the floating ball design prevents clogging from solids.

D. Food & Beverage Industry

• Process Water Systems: 2in–6in (DN50–DN150) valves with FDA-compliant PTFE seals control flow of potable water and cleaning solutions. CF8M’s smooth surface is easy to clean, meeting hygiene standards.
• Beverage Production: 3in–8in (DN80–DN200) valves regulate flow of juices, carbonated drinks, and dairy products. The leak-tight seal prevents product contamination, ensuring compliance with food safety regulations.

E. Pharmaceutical Manufacturing

• API Production: 2in–4in (DN50–DN100) valves with PTFE seals handle active pharmaceutical ingredients (APIs) and sterile process fluids. CF8M and PTFE meet FDA requirements for product contact, ensuring purity.
• Clean-in-Place (CIP) Systems: 3in–6in (DN80–DN150) valves control flow of cleaning agents (nitric acid, sodium hypochlorite) in sanitary processing lines. The valve’s design allows thorough cleaning without disassembly.

F. General Industrial Applications

• Manufacturing Plants: 2in–10in (DN50–DN250) valves regulate flow of process fluids, lubricants, and cooling water in automotive, electronics, and machinery manufacturing. Pneumatic actuation supports automated production lines.
• Marine & Offshore: 4in–16in (DN100–DN400) valves handle seawater, ballast water, and fuel in ships and offshore platforms. CF8M resists saltwater corrosion, ensuring long service life in marine environments.

VII. Customization